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Taco HEC-2 Bumblebee Buttons not working?
I have a quad using 8 Taco bumblebee's in its heating system. I recently decided to change 4 of the pumps from delta-T to SP mode however none of the 4 pumps I tried to change the programming on will respond to any button pushes. These pumps were installed in a 2016 upgrade so they arent that old. Anybody else encounter this problem or have any suggestions on how to fix? Thanks!